TW201540892A - Embroidery machine, in particnlar shuttle embroidery machine - Google Patents

Abstract

In an embroidery machine, supporting beams (121) are mounted on the frame supports (19) so as to be pivotable about a horizontal axis B. Roller supports (113) are arranged in a vertically adjustable manner at the ends of the supporting beams (121) and can be pressed against the fabric roller (17) so as to counteract sagging of the loaded fabric roller (17).

Description

Embroidery machine, especially shuttle embroidery machine

The present invention relates to an embroidery machine, in particular a shuttle embroidery machine, as claimed in the first paragraph of the patent application.

The large embroidery machine has a length of up to 30m and has hundreds of stitches. All seams are machined for a single seam web that is tensioned behind the needle along the embroidery machine at two seam axes that overlap horizontally across the machine. A tension of about 50 kg per meter causes the two shafts to bend due to the tension. In order to prevent this, a plurality of warp struts supports are arranged at a distance of, for example, 3-3.5 m, on which the so-called "Wellenlöffel" is fastened on the warp yoke support, which prevents the shaft from bending. The distance support, on the one hand, achieves a uniform tension in the seam web over the entire length, and on the other hand aligns the shaft in a manner that extends as straight as possible, so that the stitching is made during embroidery and after the tension is released With the best repeatability.

DE 287 883 discloses an embroidery machine which has an extremely short length of only about 9 m, so that a central warp yam support is arranged between the two outer parts, the yam support supporting each of which carries a shaft scoop. The upper shaft spoon supports the upper sewing material shaft from the bottom up in a manner of sagging prevention, and the lower shaft spoon supports the lower sewing material shaft from top to bottom, thereby eliminating the sagging of the pointing pieces. However, this does not prevent the situation where the seam axis occurs between the supported areas. Severe bending, therefore, the tension acting on the sprue web decreases towards the center between the two support points (ie, the shaft scoop), and the warp of the spun web is not precisely horizontal and throughout the length Parallel to extend. In addition, it has been shown that the bending caused by dynamically varying vibrations is superimposed on the static bending of the sewing material shaft when the current speed of, for example, 600 revolutions per minute (ie 600 stitches per minute) is used.

In order to reduce such dynamic bending to an acceptable level, EP 1 130 151 proposes to support the sewing shaft not only on the curved/sagging side but also on the side of the shaft. A second shaft spoon is used on one side of the embroidery area to suppress possible dynamic vibrations and to prevent the sewing material shaft from being lifted by the other shaft spoon. With such measures, satisfactory results can be achieved.

To further reduce the bending of the two seams, a number of additional supports must be placed between the existing supports. In this way, the interference bending of the sewing material shaft can be completely eliminated, but the disadvantage of this solution is that the needle and the shuttle are difficult to have the necessary accessibility, and the best work on the machine cannot be achieved. Such measures can be a hindrance to the power boost of such machines that are always sought and desired by the customer.

It is an object of the present invention to improve the shuttle embroidery machine in a manner that provides a means of substantially reducing bending even in the area between adjacent warp creel supports, without the need for additional The accessibility of the machine creates a warp creel support that is unnecessarily obstructed.

The solution to achieve the above object of the present invention is a shuttle embroidery machine having the features of claim 1 of the patent application.

The advantageous design of the shuttle embroidery machine is given by the subsidiary item.

By replacing the single shaft spoon on the warp creel support with two shaft spoons spaced a certain lateral distance from the warp struts support and arranged on one side and supported by the same warp yoke support, it can be reduced The distance between the small support points further reduces the sagging of the shaft between the support points to a minimum. By connecting two pairs of shaft spoons respectively arranged above and below a warp creel, the forces applied to the shafts can be automatically balanced or matched to each other. In this case, the isometric spoon pair is placed on a straight line over the entire length of the length of the seam axis. In this way, the surface pressure generated by each of the shaft spoons can be effectively reduced, and thus the load of the sewing cloth can be reduced to half. According to a particularly advantageous embodiment, the axial adjustment of the isometric spoon can be carried out in pairs and the pressing force can be adjusted. The arrangement of the invention preferably works in such a way that between the existing oscillating support points, for example between 3.2 and 3.6 m, there is no need for other support means which can interfere with the accessibility of the needle and the shuttle path. . In addition, the shaft spoons arranged at different distances through the shaft spoons can also suppress dynamic vibration and vibration of the sewing shaft.

Two embodiments of the present invention are described below with reference to the accompanying drawings.

1‧‧‧ warp tower

2‧‧‧ side parts

3‧‧‧Sewing material

5‧‧‧Vertical rail

7‧‧‧ warp creel guide

8‧‧‧ tower slider

9‧‧‧Uplifting device

10‧‧‧ Lower pulling device

11‧‧‧ warp trajectory

12‧‧‧ bracket

13‧‧‧ shaft spoon

15‧‧‧(top) sewing material shaft

17‧‧‧(bottom) sewing shaft

19‧‧‧ warp yam support

113‧‧‧ shaft spoon

121‧‧‧ beams

123‧‧‧Bolts

125‧‧‧Setting screws

213‧‧‧ shaft spoon

221‧‧‧ transverse bracket

227‧‧‧Leverage mechanism

229‧‧‧Leverage

231‧‧‧Threaded rod

233‧‧ Thread section

235‧‧‧Threaded holes

237‧‧‧Connecting parts

238‧‧‧pressure spring

B‧‧‧Axis of the beam

C‧‧‧ vertical axis

D‧‧‧ shaft

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a conventional warp beam tower comprising a plurality of sewing shafts fastened thereto by a conventional shaft spoon in a horizontally movable manner; a perspective view of two sewing shafts of the upper sewing material, and a warp yoke support comprising a tower carriage fastened thereto and a pair of shaft spoons according to the first embodiment of the present invention; FIG. 3 is a view of FIG. A perspective enlarged view of section A; FIG. 4 is a schematic view of two pairs of axial spoons arranged in pairs and their common support beams; Figure 5 is a longitudinal sectional view taken along line VV of Figure 4; Figure 6 is a schematic view of a second embodiment of a pair of shafts and a beam for the lower material axis; Figure 6a is an enlarged view of the section E of Figure 6. Figure 7 is an exploded perspective view of the pair of shaft spoons and the lateral bracket of the second embodiment shown in Figure 6; and Figure 8 is a schematic view of a warp frame comprising five warp frame supports.

For a better explanation of the invention, a conventional warp beam 1 is shown by means of FIG. 1 and comprises a plurality of elements fastened thereto for tightening the web 3, which constitutes a The embroidered bottom of the embroidery made later. Two tower sliders 8 are supported on the warp tower 1 on the vertically extending rails 5 in a vertically movable manner. A plurality of warp yam guides 7 are arranged on the tower sliders 8 in a horizontally movable manner. The upper and lower warp frame guides 7 are connected by a warp yoke support 19. Different (for example comprising three warp yoke supports 19 and two side parts 2 as shown in Fig. 8) the warp yam guides 7 of the warp turret 1 pass through a so-called "upper puller" such as a tube. Connected. A plurality of shaft spoons 13 are fastened to the tower slider 8 to support the seam shafts in a manner that prevents the sewing shafts 15 and 17 from bending.

The upper shaft spoon 13 supports the upper sewing material shaft 15 from bottom to top in a manner opposite to the tension applied to the sewing material web 3, and the lower shaft spoon 13 performs the lower sewing material shaft 17 from top to bottom. support. Through the upper pulling device 9 and the lower pulling device 10, the creel guide 7, the warp yoke support 19, the shaft spoon 13, and the sewing shafts 15 and 17 are supported by the sewing material 3 in a horizontally movable manner. On the slider 8. The drive required for this purpose is not shown in FIG. For the sake of clarity, all drawings also do not show the needle, its drive and the shuttle path (also known as Stöckli). These components of the embroidery machine and their arrangement are known.

A warp yam support member 19 is provided between the upper and lower warp yam guides 7 to absorb the force exerted by the sewing shafts 15 and 17 on the shaft spoon 13.

According to the first embodiment of the present invention as shown in FIGS. 2 to 5, a separate shaft spoon 13 is provided for each of the warp frame support members 19 for the upper sewing material shaft 15 and the lower sewing material shaft 17, and Two shaft spoons 113 are arranged in pairs on the upper and lower support beams 121 at a distance from each other. Two struts 121 disposed on either of the warp yoke supports 19 are joined to the warp yam support 19 at the center of the two shaft scoops 113 on the bolts 123 so as to be rotatable about the axis B. The shaft spoons 113 arranged in pairs may be vertically moved at the ends of the girders 121, i.e., perpendicular to the girders 121, and preferably also rotatably about the vertical axis C. The vertical adjustment of the shaft spoon 113 for eliminating the drooping of the sewing shafts 15, 17 is achieved, for example, by a set screw 125 or another adjustment mechanism. By supporting the support beam 121 in such a manner as to be rotatable about the horizontal axis B, the same pressing force can be automatically applied to the surface of the lower sewing shaft 17 for the two shaft spoons 113 supported on the support beam 121. As well as the support beam 121 located above, the same pressing force can be applied from the bottom to the upper sewing shaft 15 accordingly. Therefore, the pressing force of each of the individual shaft spoons 113 applied to the seam web 3 on the sewing shaft is only half that of the prior art. The support beam 121 can be embodied as a tubular member or as shown in the drawing by two metal strips connected at the ends. Preferably, the quality of the beam 121 is reduced as much as possible, because during the embroidery, the beam 121 and the shaft spoon 113 which is doubled in this number also need to be in the vertical and horizontal directions with the two sewing shafts 115 and 117. Each stitch is moved to produce the desired pattern.

According to a particularly advantageous embodiment of the invention as shown in FIGS. 6 and 7, two shaft spoons 213 are fastened to the ends of each transverse support 221. The transverse bracket 221 is connected to the warp creel passage 11 or to the warp creel guide 7 via the warp yam guide 7. In this embodiment, The two shaft spoons 213 can also be rotated about the vertical axis C so that the shaft spoon 213 can be lifted and turned away from the tip of the seam web 3 during the sewing of the sewing material, the embroidered material 3 is removed, and subsequently The embroidered material 3 is placed on the sewing shafts 15, 17. Unlike the first embodiment, the beam 221 is fixedly coupled to the warp yam support 19, i.e., cannot be rotated about a horizontal axis. However, in this embodiment, the shaft scoop 213 is vertically movably supported on the beam 221 and mechanically interactively coupled via the lever mechanism 227. The lever mechanism 227 is used on the one hand to uniformly distribute the pressing force applied to the respective sewing material shaft by the two shaft spoons 213, and on the other hand, through one of the two rotary shafts D rotatably supported on the beam 221 The upper, connected arms 229 are capable of achieving a balance between vertical position and pressing force. To achieve this, the shorter lever end 229' is placed on the shaft scoop 213 in a press fit over the top, and a connecting rod 231 is snapped onto the longer lever end 229" of the two levers 229. The connecting rod 231 It can be constructed as a threaded rod or can be provided at its end with a threaded section 233 that snaps into a corresponding threaded hole (Fig. 6a) on the connecting piece 237 hinged to the lever 229. When the connecting rod 231 is rotated The right-handed/left-handed thread can be shortened or extended to perform a common and synchronous lifting of the shaft spoon 213.

In order to balance the sag on the two sewing shafts 15, 17, that is, the bending of the two sewing shafts 15, 17 when the sewing material 3 is tensioned, the two shaft spoons 213 are swung and guided to two Above the corresponding apex of the sewing shafts 15, 17. By rotating the connecting rod 231, the two levers 229 are pulled toward each other on their longer sides 229", and the two shorter sides 229' are lowered toward the shaft scoop 213, thereby pressing the shaft scoop 213 against the slit The shafts 15, 17. Therefore, the vertical position of the shaft spoon 213 can be adjusted through the connecting rod 231 to apply the desired pressing force to the surfaces of the sewing shafts 15, 17. Through the lever mechanism 227 ( The articulated design of the lever 229 and the connecting rod 231) can further enable the two shaft spoons 213, that is, the pair of shaft spoons to uniformly press the sewing shaft 15 with the same force, 17. The shaft scoop 213 is pressed against the sewing shafts 15, 17 by springs 238 and spring-elastically pressed against the shorter side 229' of the lever 229. The spring 238 can be a coil spring or a spring disc set.

The shaft spoons 113 or 213 arranged in pairs on the support beam 121 and the lateral support 221 respectively support the two sewing material shafts 15, 17 at a distance from each other, so that any two phases along the embroidery machine will be The spacing of the support points between the adjacent creel support members 19 is reduced. On the one hand, the bending of the two sewing material shafts 15, 17 with respect to the ideal linear rotating shaft can be greatly reduced, and on the other hand, the different spacing of the connecting shaft spoons 113, 213 can be transmitted through the equal spacing of the shaft spoons. The vibration nodes of the support device, which are no longer regularly arranged, reduce the dynamic vibrations that may be present on the sewing shafts 15, 17.

Of course, it is also possible to use the double-sided shaft spoon disclosed in EP 1 130 151 instead of the one-sided axial spoons 113, 213.

Another advantage of the design shown in Fig. 6/7 is that the kinematic force is transmitted directly through the creel guide to the warp creel passage 11 without the need for an indirect manner. In other words, by directly fastening the connector 237 to the warp creel guide 7, the motion can be more directly transmitted to the shaft spoons 113, 213, thereby causing the sewing shafts 15, 17 to move more directly.

7‧‧‧ warp creel guide

17‧‧‧(bottom) sewing shaft

19‧‧‧ warp yam support

113‧‧‧ shaft spoon

121‧‧‧ beams

125‧‧‧Setting screws

B‧‧‧Axis of the beam

C‧‧‧ vertical axis

Claims (8)

An embroidery machine, in particular a shuttle embroidery machine, comprising a warp creel carried by two side members (2), comprising one or more warp yam support members (19) and at least one first and second sewing material shaft (15) , 17), the sewing shafts are rotatably and drivably supported at their ends, and each warp yoke support (19) has a bottom-up pressable to the upper sewing shaft ( 15) and a shaft spoon (113, 213) which can be pressed from top to bottom to the lower sewing shaft (17), thereby preventing the sewing shafts (15, 17) from being in the side members (2) The bending occurs due to the tension of the sewing material (3), characterized in that two shaft spoons (113, 213) spaced apart by a distance are respectively fastened in pairs on each of the warp frame support members (19). And, the two adjacent shaft spoons (113, 213) are mechanically interactively connected. An embroidery machine according to claim 1, characterized in that the shaft spoon (113, 213) is fastened to the end of the beam (121) and/or the lateral bracket (221), and Each of the two-axis spoons (113, 213) is arranged to be vertically adjusted and moved relative to the support beam (121) and/or the lateral support (221). An embroidery machine according to claim 2, characterized in that each of the support beams (121) is fastened to the warp frame support (19), and/or each lateral support (221) is fastened On the warp frame passage (11). An embroidery machine according to any one of claims 1 to 3, characterized in that the two adjacent shaft spoons (113, 213) are connected by a lever (229) and are height-adjustable. An embroidery machine according to item 4 of the patent application, characterized in that the adjacent shaft spoons (113, 213) connected by a threaded rod (231) stuck on the two levers (229) and subject to synchronous vertical adjustment. An embroidery machine according to any one of claims 1 to 3, characterized in that the support beam (121) is centrally supported on a horizontally arranged bolt (123) in a rotatable manner. An embroidery machine according to any one of claims 1 to 6, characterized in that the isometric spoon (113, 213) is fastened to the support beam (121) in such a manner as to be rotatable about a vertical axis B or The lateral bracket (221). An embroidery machine according to any one of claims 1 to 7, characterized in that the pair of side-by-side arranged shaft spoons (213) are vertically movable in a manner opposite to the force of the pressure spring (238). Supporting.